EP0100133B1 - Zinc and nickel tolerant trivalent chromium plating baths and plating process - Google Patents
Zinc and nickel tolerant trivalent chromium plating baths and plating process Download PDFInfo
- Publication number
- EP0100133B1 EP0100133B1 EP83301258A EP83301258A EP0100133B1 EP 0100133 B1 EP0100133 B1 EP 0100133B1 EP 83301258 A EP83301258 A EP 83301258A EP 83301258 A EP83301258 A EP 83301258A EP 0100133 B1 EP0100133 B1 EP 0100133B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nickel
- zinc
- bath
- trivalent chromium
- ppm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 37
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 33
- 239000011651 chromium Substances 0.000 title claims abstract description 33
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000011701 zinc Substances 0.000 title claims abstract description 31
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 31
- 238000007747 plating Methods 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 10
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- 150000007513 acids Chemical class 0.000 claims abstract description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- UOCCVDMCNJYVIW-UHFFFAOYSA-N prop-2-yne-1-sulfonic acid Chemical class OS(=O)(=O)CC#C UOCCVDMCNJYVIW-UHFFFAOYSA-N 0.000 claims description 5
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- NVSONFIVLCXXDH-UHFFFAOYSA-N benzylsulfinic acid Chemical class O[S@@](=O)CC1=CC=CC=C1 NVSONFIVLCXXDH-UHFFFAOYSA-N 0.000 claims description 2
- 238000011109 contamination Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 125000001931 aliphatic group Chemical group 0.000 abstract 1
- 125000003118 aryl group Chemical group 0.000 abstract 1
- 125000000623 heterocyclic group Chemical group 0.000 abstract 1
- 150000003871 sulfonates Chemical class 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 125000004434 sulfur atom Chemical group 0.000 abstract 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 19
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 description 12
- 239000000654 additive Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000004615 ingredient Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000002798 spectrophotometry method Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- CHLCPTJLUJHDBO-UHFFFAOYSA-M sodium;benzenesulfinate Chemical compound [Na+].[O-]S(=O)C1=CC=CC=C1 CHLCPTJLUJHDBO-UHFFFAOYSA-M 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- AKGGYBADQZYZPD-UHFFFAOYSA-N benzylacetone Chemical compound CC(=O)CCC1=CC=CC=C1 AKGGYBADQZYZPD-UHFFFAOYSA-N 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- WHOZNOZYMBRCBL-OUKQBFOZSA-N (2E)-2-Tetradecenal Chemical compound CCCCCCCCCCC\C=C\C=O WHOZNOZYMBRCBL-OUKQBFOZSA-N 0.000 description 1
- FPYUJUBAXZAQNL-UHFFFAOYSA-N 2-chlorobenzaldehyde Chemical compound ClC1=CC=CC=C1C=O FPYUJUBAXZAQNL-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- QZOSNMCPEHRQEW-UHFFFAOYSA-N butanedioic acid 1-hexylsulfonylhexane Chemical compound C(CCC(=O)O)(=O)O.C(CCCCC)S(=O)(=O)CCCCCC QZOSNMCPEHRQEW-UHFFFAOYSA-N 0.000 description 1
- -1 butynediol Chemical compound 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 229940055042 chromic sulfate Drugs 0.000 description 1
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 1
- 229910000356 chromium(III) sulfate Inorganic materials 0.000 description 1
- 235000015217 chromium(III) sulphate Nutrition 0.000 description 1
- 239000011696 chromium(III) sulphate Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- JGUQDUKBUKFFRO-CIIODKQPSA-N dimethylglyoxime Chemical compound O/N=C(/C)\C(\C)=N\O JGUQDUKBUKFFRO-CIIODKQPSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 125000002228 disulfide group Chemical group 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-M ethenesulfonate Chemical compound [O-]S(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-M 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229940044654 phenolsulfonic acid Drugs 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- TVDSBUOJIPERQY-UHFFFAOYSA-N prop-2-yn-1-ol Chemical compound OCC#C TVDSBUOJIPERQY-UHFFFAOYSA-N 0.000 description 1
- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 description 1
- 229940081974 saccharin Drugs 0.000 description 1
- 235000019204 saccharin Nutrition 0.000 description 1
- 239000000901 saccharin and its Na,K and Ca salt Substances 0.000 description 1
- KHDBMTLGTSGEEG-UHFFFAOYSA-M sodium;2-methylbenzenesulfinate Chemical compound [Na+].CC1=CC=CC=C1S([O-])=O KHDBMTLGTSGEEG-UHFFFAOYSA-M 0.000 description 1
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
- 150000003456 sulfonamides Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229910021654 trace metal Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used
Definitions
- This invention relates to the electrodeposition of chromium from trivalent chromium plating baths.
- trivalent chromium plating operation frequently depends on the prevention of interference from common metal ions such as iron, nickel, copper, zinc and lead which have entered the bath.
- trivalent chromium plating processes are known to have very low tolerance to metallic impurities.
- the tolerance of the bath to zinc and copper is especially low, thus necessitating the exercising of extreme care to avoid contamination with these metals.
- Copper can be plated out using low current density electrolysis, but zinc does not plate out well and consequently poses a greater problem.
- Zinc is extremely active and will dissolve readily under the acidic condition of the bath, and consequently, dropped parts must be removed rapidly. In the case of parts that are not completely plated prior to chromium plating, as for example due to extremely low current density areas, some dissolution is unavoidable.
- zinc should be present at a level of below 20 ppm in order to avoid plating faults. At a level of 20 ppm, or greater, a whitish hazy band will appear at the lower limit of the plating range. As the zinc level increases in the bath, the coverage is reduced and the white haze moves into the higher current density areas.
- the process involves the use of a water soluble ferrocyanide to precipitate trace metal contaminants including zinc, from the bath.
- the process is time consuming and it is known that cathodic filming can occur.
- the film is so heavy that, in some instances, parts plated in a solution which employs ferrocyanide must be physically wiped down to remove the adherent powder.
- nickel contamination is especially difficult to contend with because ordinarily, it does not readily plate out.
- nickel is added to the plating bath as part of its composition, as seen for example, in US Patent Specification 3954574. Nickel can be present to saturation for the purpose of codeposition.
- the level of nickel tolerance is inversely related to the required quality level of the appearance of the deposit.
- the plating baths of specification 4093521 can only tolerate up to 150 ppm of nickel, or up to 100 ppm nickel in the presence of iron, with a combined concentration of up to 150 ppm of iron and nickel.
- Nickel contamination removal commonly involves the use of precipitation with an agent such as dimethylglyoxime.
- An agent such as dimethylglyoxime.
- the high cost of the agent and the difficulty of precipitating the resultant flocculant precipitant render this technique less than perfect.
- a ferrocyanide salt can also be used but not without problems, as previously noted.
- One class of additives consists of various sulfonic acids and their salts and sulfonamides, all containing a radical having a mercapto group, a disulfide group or a benzene ring: sodium allyl sulfonate and sodium vinyl sulfonate are somewhat surprisingly given as examples of additives coming within this class.
- trivalent chromium plating bath refers to any of the typical plating solutions based on trivalent chromium, a complexing agent and conductivity salts as their basic constituents. These are well known and include plating baths such as those mentioned in U.S. Patent Specifications 3 954 574, 4 141 803 and 4 167 460.
- the term "normal trivalent chromium plating bath” refers to one that is operative and free from harmful metallic impurities.
- the bath could contain chromic sulfate, potassium and ammonium chloride, boric acid, ammonium formate, acetic acid and ferrous ammonium sulphate, or other standard ingredients.
- the additive functions as a chelating or coupling agent and does not serve as a precipitating agent.
- the additives of the present invention are applicable to trivalent chromium plating baths in general.
- the baths were kept in ambient temperature and mild agitation was provided near the cathode by a stirring bar and magnetic stirrer.
- the freshly plated nickel cathodes which were employed were water rinsed and acid dipped and then plated in the 500 ml Hull Cell with a graphite anode for three minutes at 5 amperes.
- a trivalent chromium plating solution containing 50 ppm of zinc was used to plate a Hull Cell panel.
- the resulting deposit was clear bright from the high current density edge down to 13 amp/ d M 2 (asd) and had a whitish haze from about 3 to 13 asd.
- Example 1 To the bath of Example 1 was added an additional 0.88 g/I sodium allyl sulfonate. In addition to the haziness being eliminated, the deposit color was evened out.
- a trivalent chromium plating solution containing standard ingredients as well as 50 ppm of zinc and 140 ppm of nickel was used to plate a Hull Cell panel.
- the resulting deposit had a white haze from about 3 to 13 asd. In addition the deposit was dark from 2 to 3 asd.
- a trivalent chromium plating solution containing standard ingredients, as well as 50 ppm of zinc and 150 ppm of nickel was used to plate a Hull Cell panel.
- a hazy deposit which was additionally dark in the low current density area was produced.
- Example 5 The sodium benzene sulfinate level of Example 5 was increased to 0.33 g/I. Almost all darkness and haziness in the low current density area was gone leaving a nice looking deposit.
- a trivalent chromium plating solution containing standard ingredients as well as 100 ppm of zinc was set up in 500 ml Hull Cells for low current density electrolysis. The solution was electrolyzed at an average current density of 3 asd for 6 amp- hrs/I. Spectrophotometric analysis of the bath indicated the zinc level was reduced to 78 ppm.
- the trivalent chromium plating solution of Control 5 with an addition of 0.44 g/I of sodium allyl sulfonate was, in the manner of Control, electrolyzed at 3 asd for 138 amp-hrs/l. Spectrophotometric analysis of the bath indicated the zinc level was reduced to 22 ppm, indicating a much greater plate out rate for the bath with the 0.44 g/I of sodium allyl sulfonate.
- a trivalent chromium plating solution containing standard ingredients as well as 300 ppm of nickel was used to plate a Hull Cell panel. Black streaking from 4 to 20 asd was observed.
- a trivalent chromium plating solution containing standard ingredients, as well as 880 ppm of nickel was used to plate a Hull Cell panel.
- the deposit had heavy streaking across the Hull Cell panel.
- a trivalent chromium plating solution containing standard ingredients as well as 300 ppm of nickel was used and a Hull Cell panel was run giving the typical nickel effect of black streaking from 4 to 20 asd.
- a trivalent chromium bath was analyzed spectrophotometrically and determined to contain 380 ppm of nickel. Following the standard procedure, a Hull Cell panel was run and observed to have heavy black streaking from about 2 to 20 asd.
- additives which were found to fail to produce the desired effect include propargyl alcohol, saccharin, butynediol, glutaraldehyde, o-chlorobenzaldehyde and benzyl acetone.
- Propargyl sulfonate was added in increasing amounts to the bath of Control 9 and Hull Cell panels were run after each addition of the sulfonate. At 0.05 g/I concentration level, the intensity of the streaking was greatly reduced. At a 0.25 g/I concentration level, all of the black streaking previously observed, had disappeared.
- Hull Cell testing was carried out on a standard working bath, which was kept at ambient temperature, and mildly agitated using a stirring bar and magnetic stirrer. Freshly plated nickel cathodes were used. They were water rinsed, acid dipped and then plated in the test solution for three minutes using five amperes. To the bath, 400 ppm of nickel was added and a Hull Cell panel was run. It exhibited a typical nickel effect, exhibiting heavy jagged streaking from about 4 to 20 asd. A sulfonate surfactant, dihexyl sulfon- succinic acid was added to the bath and further. tests were made. At 0.01 g/I, the concentration typically found in a plating bath, no effect was noted. At 0.1 g/I, not only was there no improvement, but a haze developed in the low current density which was attributed to the presence of the surfactant.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Chemically Coating (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT83301258T ATE31743T1 (de) | 1982-07-28 | 1983-03-08 | Zink und nickel tolerante, dreiwertiges chrom enthaltende, plattierungsbaeder und plattierungsverfahren. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/402,657 US4450052A (en) | 1982-07-28 | 1982-07-28 | Zinc and nickel tolerant trivalent chromium plating baths |
| US402657 | 1982-07-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0100133A1 EP0100133A1 (en) | 1984-02-08 |
| EP0100133B1 true EP0100133B1 (en) | 1988-01-07 |
Family
ID=23592813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83301258A Expired EP0100133B1 (en) | 1982-07-28 | 1983-03-08 | Zinc and nickel tolerant trivalent chromium plating baths and plating process |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4450052A (enrdf_load_stackoverflow) |
| EP (1) | EP0100133B1 (enrdf_load_stackoverflow) |
| JP (1) | JPS5928587A (enrdf_load_stackoverflow) |
| AT (1) | ATE31743T1 (enrdf_load_stackoverflow) |
| CA (1) | CA1223546A (enrdf_load_stackoverflow) |
| DE (1) | DE3375166D1 (enrdf_load_stackoverflow) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3402554A1 (de) * | 1984-01-26 | 1985-08-08 | LPW-Chemie GmbH, 4040 Neuss | Abscheidung von hartchrom auf einer metallegierung aus einem waessrigen, chromsaeure und schwefelsaeure enthaltenden elektrolyten |
| GB2171114A (en) * | 1985-02-06 | 1986-08-20 | Canning W Materials Ltd | Trivalent chromium electroplating baths and rejuvenation thereof |
| DE3909811A1 (de) * | 1989-03-24 | 1990-09-27 | Lpw Chemie Gmbh | Verwendung von zumindest einer organischen sulfinsaeure und/oder von zumindest einem alkalisalz einer organischen sulfinsaeure als mittel ... |
| US6004448A (en) * | 1995-06-06 | 1999-12-21 | Atotech Usa, Inc. | Deposition of chromium oxides from a trivalent chromium solution containing a complexing agent for a buffer |
| EP1215304A1 (en) * | 2000-12-06 | 2002-06-19 | Lido Frediani | Two-layer chrome-plating process |
| ES2669050T3 (es) * | 2006-03-31 | 2018-05-23 | Atotech Deutschland Gmbh | Depósito de cromo cristalino |
| MX2010003543A (es) | 2007-10-02 | 2010-05-17 | Atotech Deutschland Gmbh | Deposito de aleacion de cromo cristalino. |
| BR112013027921B1 (pt) * | 2011-05-03 | 2020-10-06 | Atotech Deutschland Gmbh | Banho de galvanização e método eletrodeposição de uma camada de cromo escuro em uma peça de trabalho |
| EP3725920A4 (en) * | 2017-12-13 | 2021-04-21 | JCU Corporation | TRIVALENT CHROME PLATING SOLUTION AND CHROME PLATING PROCESS USING IT |
| US20210198797A1 (en) * | 2017-12-14 | 2021-07-01 | Jcu Corporation | Trivalent chromium plating solution and trivalent chromium plating method using same |
| WO2021122932A1 (en) | 2019-12-18 | 2021-06-24 | Atotech Deutschland Gmbh | Electroplating composition and method for depositing a chromium coating on a substrate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0058044A1 (en) * | 1981-02-09 | 1982-08-18 | W. Canning Materials Limited | Electrodeposition of chromium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB301478A (en) * | 1927-12-01 | 1929-02-21 | Langbein Pfanhauser Werke Ag | Process for the electrolytic deposition of chromium |
| US2822326A (en) * | 1955-03-22 | 1958-02-04 | Rockwell Spring & Axle Co | Bright chromium alloy plating |
| GB1304844A (enrdf_load_stackoverflow) * | 1969-04-24 | 1973-01-31 | ||
| GB1455580A (en) * | 1973-12-13 | 1976-11-17 | Albright & Wilson | Electrodeposition of chromium |
| ZA755497B (en) * | 1974-09-16 | 1976-08-25 | M & T Chemicals Inc | Alloy plating |
| FR2472621A3 (fr) * | 1979-12-28 | 1981-07-03 | Xantia National Corp | Procede pour l'obtention de depots metalliques brillants d'au moins un element du groupe fer-nickel-cobalt ou d'un alliage d'un ou de plusieurs de ces elements avec le chrome |
-
1982
- 1982-07-28 US US06/402,657 patent/US4450052A/en not_active Expired - Fee Related
- 1982-12-24 CA CA000418598A patent/CA1223546A/en not_active Expired
-
1983
- 1983-03-08 EP EP83301258A patent/EP0100133B1/en not_active Expired
- 1983-03-08 AT AT83301258T patent/ATE31743T1/de not_active IP Right Cessation
- 1983-03-08 DE DE8383301258T patent/DE3375166D1/de not_active Expired
- 1983-07-05 JP JP58122262A patent/JPS5928587A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0058044A1 (en) * | 1981-02-09 | 1982-08-18 | W. Canning Materials Limited | Electrodeposition of chromium |
Also Published As
| Publication number | Publication date |
|---|---|
| US4450052A (en) | 1984-05-22 |
| EP0100133A1 (en) | 1984-02-08 |
| ATE31743T1 (de) | 1988-01-15 |
| JPH0344155B2 (enrdf_load_stackoverflow) | 1991-07-05 |
| JPS5928587A (ja) | 1984-02-15 |
| CA1223546A (en) | 1987-06-30 |
| DE3375166D1 (en) | 1988-02-11 |
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| Publication | Publication Date | Title |
|---|---|---|
| EP0100133B1 (en) | Zinc and nickel tolerant trivalent chromium plating baths and plating process | |
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